Color blindness or color vision deficiency is not complete blindness at all instead, it is a condition that prevents a person from differentiating certain colors from each other.
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Color blindness mostly occurs when the color-detecting nerve cells in the back of the eye (cones) don't respond properly to certain wavelengths of light that help for color vision.
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Color blindness affects:
Over 300 million people globally
1 in 12 are male and
1 in 200 female Â
You can start testing for color blindness in children over four years old! In the most recent comprehensive study researching color blindness in children, the Multi-Ethnic Pediatric Eye Disease Study Group used the Color Vision Testing Made Easy test. If you bring a child to an eye doctor, they may utilize this pediatric test to discover if your child is color blind or not.
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Adults can grab a free online color blindness test, which uses numbers and letters rather than shapes, to find out if they are color blind. Older children who know their numbers and letters can also take the test.
A child can be successfully tested for color vision deficiency at the very young age of 4. At that age, he or she is grown enough to answer questions about what they see. Many schools will conduct color vision tests at a young age to determine if color-coded learning machines will be an issue. If so, alternative learning techniques can opt.
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Keep in mind that children should be screened for other relevant vision problems such as nystagmus and low vision at a younger age.
Three main types of color vision deficiency (color blindness) are as follows:Â
Red-green color blind:Â
Deuteranomaly:Â In this case, green-responsive cones do not work as they should. It is the most common condition of color blindness. Your rainbow is most likely blues, yellows, and commonly muted colors.
Protanomaly:Â In this type of color deficiency, you have some red-responsive cones, but they are not working perfectly. Your rainbow seems muted. Red may seem like dark gray and every color that has red may be less bright.
Protanopia:Â Â In this case, your long-length red-responsive photoreceptors also are not working accurately, so you won't see reds or greens correctly. Colors that have red will also seem different to you. Your rainbow will consist mainly of what trichromats name blues and golds.
deuteranopia: This time your green-responsive photoreceptors aren’t functioning. If you’re a deuteranope, your rainbow also occurs as a series of blues and golds.
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Blue-yellow color blind:
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Tritanopia:Â This is blue-yellow color blindness. It means that you don't have blue-responsive cone cells. Your rainbow may include reds, light blues, pinks, and lavender.
Tritanomaly:Â This type of color blindness occurs when your blue-responsive cone cells work but not like a full color-sighted person. Your rainbow has greener blues and there is little or no yellow in it.
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Complete color blind:Â Â
If you have complete color blindness, you can’t see colors at all. This is also called monochromacy, and it is quite uncommon. Depending on the type, you may not have clear vision and you may be more sensitive to light.
Look for early clues and symptoms to spot colorblindness in children earlier rather than later.
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Noticing color blindness is difficult for adults, let alone children. Spotting colorblindness in children allows you to take action early, providing them with a pair of color blind glasses to help restore their vision - specifically so they are school-ready.
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There are numerous other types of color blindness, but the most common is a red-green color deficiency. This often results in difficulty differentiating between colors such as reds, greens, browns, oranges, blues, and purples.
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Red-green color blindness is usually inherited (genetic), you are born with it, with this carried out by your parents. However, in some circumstances, this kind of color blindness can be developed with age.
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Other types of color deficiency contain blue color blindness, difficulty in differentiating between shades of black and blue, and monochrome color blindness– only seeing shades of black, white, and grey. Yet, this affects less than 1% of those who are color blind.
There are different early signs to look out for, but the primary sign is problems while distinguishing between colors or making blunders when determining different colors. For example, combining the shades of red and green with browns or blues is looking purple.
Additional signs include:
- Selecting the wrong colors while painting an object – e.g. purple leaves, green faces, etc.
- Low attention span when coloring in worksheets
- Denial of color issues
- Problems in identifying red or green colored pencils or any color pencil with red or green in its composition. (e.g. differentiating purple from blue, pink from grey, red from brown, etc.)
- Identification of colors may be made worse by low-level lights, working with small spots of color and colors of the same shade, contrarily, they may find colors that are easier to distinguish between in good natural daylight
- Smelling food before eating
- Sensitivity to bright lights and some color combinations
- Reading problems with coloring pages or worksheets made with color
- Children may complain that their eyes or head hurt if glancing at something red on a green background, or vice versa.
- Good at ‘seeing through’ camouflage
While treatment for color blindness has yet to be discovered. There are coping methods that can help your child adjust to their color vision deficiencies and to enjoy a normal happy life. For example, motivate your child to learn to match colors with things by memorization, prepare your child to choose outfits that match by asking a parent, sibling, or friend, and help your child identify specific items by their order rather than color such as a traffic light.
Special lenses that utilize filters to improve color perception have been designed for people with color blindness. However, these lenses are not always useful and can be extremely costly.
Color blindness is a condition where someone can’t see specific colors. There are different types of color blindness, and red-green color blindness is the most common. Most people who are color blind are born with the disease, and this disease is often found in males. While there is no treatment for color blindness, kids can learn methods to better manage the condition. There are a few new technologies like glasses and phone apps for people who can’t see color.
